<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div
            class="button-wrapper"
            v-for="item of hot"
            :key="item.id"
            @click="hanldeCityClick(item.name)"
          >
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area" v-for="(item, key) of cities" :key="key" :ref="key">
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div
            class="item border-bottom"
            v-for="innerItem of item"
            :key="innerItem.id"
            @click="hanldeCityClick(innerItem.name)"
          >
            {{innerItem.name}}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapState, mapActions } from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      'currentCity': 'city'
    })
  },
  methods: {
    hanldeCityClick (city) {
      // this.$store.dispatch('cityChange', city)
      this.cityChange(city)
      this.$router.push('/')
    },
    // 把actions的cityChange方法映射到这个组件里面一个cityChange方法里面
    ...mapActions(['cityChange'])
  },
  // Alphabet.vue里的作出字母项单击后会见单击的字母传到父组件，再从父组件传过来，监听到字母变化时，列表跳转到相应织字母那里
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  mounted () {
    // vue项目中使用better-scroll @click事件在移动端失效
    // 加上{ mouseWheel: true, click: true, tap: true }就解决了
    this.scroll = new BScroll(this.$refs.wrapper, { mouseWheel: true, click: true, tap: true })
  }
}
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl'
.border-topbottom
  &:before
    border-color: #cccccc
  &:after
    border-color: #cccccc
.border-bottom
  &:before
    border-color: #cccccc
.list
  position: absolute
  top: 1.58rem
  left: 0
  right: 0
  bottom: 0
  overflow: hidden
  .title
    line-height: .54rem
    background-color: #eeeeee
    padding-left: .1rem
    font-size: .26rem
    color: #666666
  .button-list
    padding: .1rem .6rem .1rem .1rem
    overflow: hidden
    .button-wrapper
      float: left
      width: 33.33%
      .button
        padding: .1rem 0
        border: .02rem solid #ccc
        text-align: center
        border-radius: .06rem
        margin: .1rem
  .item-list
    .item
      line-height: .76rem
      padding-left: .2rem
</style>
